Printing machine



May 5,1931. J. KRELL 1 1,803,940

PRINTING MACHINE Filed NOV- 18, 1926 3 Sheets-Sheet l May 5, 1931. J. KRELL v 1,803,940

PRINTING MACHINE Filed NOV. 18, 1926 3 Sheets-Sheet 2 May 5, 1931. J. KRELL PRINTING MACHINE 3 Sheets-Sheet 3 Filed Nov. 18 1926 lnmlullunlnlll ml c Patented May 5, 1931 UNITED STATES JOSEPH KBELL, OF BEBLIN-PAN'KOW, GERMANY PRINTING MACHINE Application led November 18, 1926, Serial No. 149,192, and in Germany December 4, 1925.

which may be due to local conditions, to wit, various types of current or voltages available in dilerent localities, or to other causes. For this reason the electromagnet must be adapted to dierent conditions. y

In a preferred embodiment of my machine, four operating stations are provided Jii'om which the drive of the machine may be cut out by hand, by a skip plate, by the seriesprinting slide, and by the base plate of the hopper in which the plates that have been printed, are stored.

The clutch for connecting the machine with its drive is controlled by the operator and its control is automatically locked in the position iii which the clutch is thrown in. The locking means are operatively connected with a pawl to which all the cables are attached and, when one of the cables is operated this pawl releases the locking means and allows the control to throw out the clutch.

In the drawings an addressing machine equipped with my improved controlsA is illustrated by way of example.

Fig. 1 is a perspective illustration ot' the machine, the other gures show details oaf-the machine on a larger scale as follows:

Fig. 2 is an elevation of the hand control,

vFig. 3 is an elevation, partly in section,

n of the clutch intermediate the drive andthe machine, showing the control of the clutch in its inoperative or locked position,

Fig. 4 is an end elevation Vof the bracket on which the cable-connected locking pawl is ulcrumed,

T1Fig. 5 is a section on the line V-V in i* ig. 4, Y

Fig. 6 is an elevation similar to Fig. 3 showing the clutch control in its operative or unlocked position,

Fig. 7 is an elevation lof the control by which the machine is stopped when a series has been printed, in its inoperative position, Fig. 8 is a section on the line VIII-VIII in 7, l

Fig. 9 is a plan view of this control,

10 is anelevation corresponding to Fig. r b ut showing theV control in its operative position,

n Fig. 11 is a plan view of the control which is operatedy by a skip plate, A Fig. 12 is a section onY the line XII-XII in Fig. 11,

Fig. 13 is an elevation, partly in section, of

the operators control for the clutch, showing it in the position in which the clutch is thrown in,

Fig. 14 is a similar elevation showino' the operators control iii the position in vifahich the -clutch is thrown out, u Figs. 1 5 and 16 are elevations corresponding to Figs. 7 and 10, showing a modified type of series control,

iig. 17 is a section on `h V XVII of Fig. 15. t e 1m@ AVH Referring now to Fig. .1, 1 is the table of the machine, are its legs, 3 is the magazine for the printing plates 6, 4 is the printinoA head, 5v is the printing lever at one end oki which the printing head is carried, 7v is a slide along which the printing plates are moved past the printing station below the head 4; 8 is a hopper on the movable base plate 63 of which the plates 6 are collected after having been printed, 9 is a series printing slide, 10 is its operating bar, 11 is the guide frame lfor the slide and the bar, 12 is an electroinotor carried in the frame 2 of the table 1; 12 is a belt or cable ona pulley of the motor, and 13 is a gearing comprising a Apulley 14, Fig. 3, which is keyed on a shaft 15, a disc 18 which is free to rotate on the shaft 15, a pin 16 adapted to engage a bore 17 in the disc 18, and a spring 16 which tends to push the pin 16 linto the bore 17 so as to operatively connect the pulley 14 and the disc 18.

The disc 18 is operatively connected with the mechanisms for operating the printing arm, the feed of the printing plates, etc. These means are not a part of the present invention yand are therefore not shown.

Referring now to Figs. 3, 13 and 14; 22 is a tubular guide secured below the table 1; 2O is a rod adapted to slide iin the tube, 21 is a spring inserted between a shoulder at -the end of the rod and a shoulder in the tube 22; 19 is a sort of blade secured to the upper end of the rod the boss of which blade forms the upper shoulder for the spring 21, and 19 is an inclined face on pin 16 which is adapted to cooperate with the correspondingly inclined upper edge of the blade 19 so that the pin 16 is moved out of the bore 17 in the disc 18 when the spring 21 is allowed to push the blade 19 upwards into the position shown in Fig. 14. In this position of the blade, the clutch 14, 18 is thrown out and the machine sto s.

2l4 is a lever, preferably a pedal, at the lower end of the rod 2O which is adapted to be depressed by the operator as indicated by the arrow in Fig. 14 so as to pull down the blade into the position of Fig. 13, releasing the pin 16 and allowing it to throw in the clutch which starts the machine.

rlfhe machine is equipped with one hand control and three automatic controls and consequently with four Bowden cables 34, 35, 36

f and 36. It will be understood that I am not limited to any definite number o-f hand and automatic controls.

The four Bowden cables illustrated are all connected to a bar 36 which constitutes a lock for the operators control 24; 31 is the fulcrum of the bar on a bracket 38 on the tube 22; 37 is a guide for the cables formed at, or secured to, the upper end of the bracket 38; 32 is a pull-back spring secured to the bar 30 at one end and to the bracket of a pin 26 at the other; 33 is a check for the downward motion of the bar 30; 29 is a projection on the bar 30; 25 is a locking pawl on the pin 26, and 27 is a rod connecting the pawl 25 with the end 28 of the pedal 24 which projects beyond its pivot 27 at the rear.

The locking pawl 25 is adapted to cooperate with the projection 29 on the bar 30 so that when the pedal 24 is depressed the pawl 25 will be swung upwards as shown by the arrow in Fig. 13, and lock the rod 2O against downward motion by its contact with the projection 29 of the bar 30, as shown in Fig. 13. However, when one of the four Bowden cables, no matter which, is pulled the projection 29 moves clear of the locking pawl 25 and the spring 21 is free to move the blade 19 upwards so that the clutch 14, 18 is thrown out. In this position of the parts, the pedal 24 is raised. lvVhen the pull on the cable which has been operated, ceases, the operator may start the machine again by depressing the pedal 24, as indicated by the arrow in Fig. 14.

The first cable 34 is connected with the lever 40 of the hand control, the second cable 35 is connected with a pawl 44 which cooperates with the skip plates 6, Fig. 11, the third cable 36 is connected with a pawl 53 which cooperates with the series bar 10, and the fourth cable 36 is connected with the base plate 63 of the hopper 8 for the plates 6 that have been printed so as to stop the machine when the hopper is filled, Fig. 1.

Referring now to Fig. 2, the handle 40 of the hand control is fulcrumed at40 below the table 1 and provided with an angular eX- tension 41, and 42 is a spring which tends to hold the end 40 of the angular lever in the position shown in full lines. The cable 34 is guided in a sleeve at the end of a bracket 42 secured to the lower face of the table to which the rear end of the spring 42 is attached. V] hen the handle 40 is raised into the dotand-dash lines position a pull isexerted on the cable 34 in the direction of the arrow 40, Figs. 2 and 3, causing the pawl 30 to release the pawl 25 and throwing out the clutch, as described. A

Referring now to Figs. 11 and 12, 6 is a skip plate and the edge of which is recessed at 6, 44 is a pawl which is adapted to engage the recess 6 by its end44, 45 is a 'lever secured below the table 1 on the pin 43 of the pawl 44 and 46 is a pull-back spring which is attached to the end of the lever 45 and tends to pull the end 44 of the pawl into the recess 6 by turning the pawl as indicated by the curved arrows. The cable 35 is attached to the lever 45. The spring 46 holds the cud 44 engaged with the edge of the plate 6 until the recess 6 is opposite the end 44 when the end is free to move into the dot-and-dash lines position, pulling the cable 35 in the direction of the arrow 40a and throwing out the clutch.

Referring now to Figs. 7 to 10, a bracket 49 is secured onthe series guide frame 11 in the position 47'shown in Fig. 1, in which it is held by friction and the pressure of a spring 48, Fig. 8. 53, 54 is a double-armed pawl to the arm 54 of which the cable 36 is attached, 53 is its fulcrum on the bracket 49, 59 is a pull-back spring secured to the arm 53 of the pawl and the guide 60 for the cable, 61 is a thumb plate formed at the upper end of the arm 54, 51 is a locking pawl which is adapted to engage the end of the lever 53 which is bent at right angles at 58, 50, is the fulcrum of the locking pawl, 57

is a spring-actuated piston which tends to move thelocking pawl 51 to the right in Figs. 7 and 10, 55 is a projection on the front end of the locking pawl 55, and 56 is a corresponding projection on the series operating bar 10. i

In the position of parts shown in Fig. 7, the arm 53 is held by the pawl 51 but when the projection 56 on the bar 10, which bar is advancing in the direction of the arrow in Fig. 7, engages the projection 55 on the locking pawl 51 the pawl is pushed back and releases the end of the pawl 53, 54 so that the spring 59 moves the pawl into the position shown in Fig. 10 in which it exerts a pull on the cable 36 in the direction of the arrow L10b and the machine is stopped.

The cable 36 being rather long, provision is made tor allowing the cam 53, 54 to turn through a corresponding angle under the action ot its spring 59 which motion it performs without interference, being merely released by the locking pawl 51. The pawl may be returned into its initial position, Fig. 7, by the thumb plate 61.

Referring now to Figs. 15 to 17, these show a modification of the mechanism just described in that instead of the projection 55 on the lever 51 a pawl 55 is secured on its Jfulerum which cooperates with a straightedge 56 on the bar 10. This straight-edge causes the pawl 51 to release the pawl 53, 54 the same as described with reference to Figs. 7 to 10 but the straight-edge 56 is free to move on after the pawl has thus been released whereas in Figs. 7 to 10 the projection 56 is positively arrested by the projection 55. This prevents damage to the machine in case of careless operation for, if the operator by mistake depresses the pedal 9A at the moment when the straight-edge 56 has reached its operative position the machine moves on notwithstanding the action of the cable 36 but the straight-edge may also move on as the end ot the pawl 55 is sliding on the straight-edge without arresting it.

Referring now again to Fig. 1, 62 is a dog adjacent the hopper 8 for the printed plates. A spring', not shown, tends to hold the dog to which the fourth cable 36 is attached, in its upper end position. The base plate G3 ot the hopper moves gradually downwards as the plates collect in it and when the base plate 63 is in its lower final vposition, that is, when the hopper is completely filled, the base plate engages the dog 62, stopping the machine as before and calling` the operators attention to the necessity ot eX- changing the illed hopper for an empty one.

I claim:

1. In a printing machine, driving mechanism comprising a clutch, automatic means tending to throw in said clutch, manually operated means for throwing out said clutch against the action of said automatic means, a locl for said automatic means, and handoperated-means comprising a Bowden cable for releasing said lock.

2. In a printing machine, driving mechanism comprising a clutch, automatic means tending to throw in said clutch, manually JOSEPH KRELL. 

